Question about 2010 Chevrolet Cobalt

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Chevy cobalt 2010 scan code po641 reduce engine power

Reduce engine power sensor scan code po641

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Possible causes
- Faulty Engine Control Module (ECM)
- ECM harness is open or shorted
- ECM circuit poor electrical connection
- Shorted sensor on 5 volt circuit
chevy cobalt 2010 scan code po641 reduce engine po - help.jpg What does this mean? When is the code detected?
The Engine Control Module (ECM) has detected the sensor 5 volt reference circuit voltage is higher or lower than expected
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0641 Chevrolet Description
The control module has 2 internal 5-volt reference buses called "5-volt reference 1" and"5-volt reference 2". Each reference bus provided 5-volt reference circuit for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to the reference bus. The control module monitors the voltage on the 5-volt reference buses.

Read more: http://engine-codes.com/p0641_chevrolet.html#ixzz31AP60YfR

Posted on May 08, 2014

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: cobalt

When you have the display panel say engine power reduced...and car stops. The item that needs checking and replacing is called a ECM- Electronic Control Module, it looks like a miniature sealed laptop that plugs in on the drivers side of the engine. We used to have the car do this all the time, until we replaced that module, I have since put 30 K on the car, and it now runs fine. It did cost a few bucks to fix for sure.

Brenda

Posted on Oct 04, 2008

abauto
  • 353 Answers

SOURCE: why does reduce engine power light comes on chevy

That is a hard problem to pin point without knowing what codes the computer has stored. It can be any number or sensors or engine problems.

You can go to most auto parts stores and they will pull the codes for you for free.

Posted on Jul 27, 2009

  • 7 Answers

SOURCE: tps sensor code, map code and engine power reduced

Cant be for sure by the vague description you wrote, but it looks to me it might be the catalytic converter.

Posted on Dec 11, 2009

texastbone
  • 63 Answers

SOURCE: 2005 chevy cobalt, car wont start ... check

disconecting the battery should reset the pcm. but you will need to find out what caused the problems.

Posted on Jan 06, 2010

skychief2001
  • 21873 Answers

SOURCE: engine won't start and shows trouble code P1516 and reduced engine power light is on

Here is the definition of the code.

Possible causes - Faulty Throttle Actuator Control (TAC) module
- Throttle Actuator Control (TAC) module harness is open or shorted
- Throttle Actuator Control (TAC) module circuit poor electrical connection (loose or broken wires)

P1516 CHEVROLET Description The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. The TAC module continuously test the integrity of this data. When the TAC module is unable to write or read data to and from Random Access Memory (RAM), or the TAC module is unable to correctly read data from the flash memory or and internal TAC module processor fault is detected and the Detected Trouble Code (DTC) is set.
Read more: http://engine-codes.com/p1516_chevrolet.html#ixzz286Gl3cSo

Posted on Oct 02, 2012

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You can go to most auto parts stores and they will pull the codes for you for free.

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